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I am trying to print a GS1-128 Barcode using ZPL and when I print this out for some reason everything prints fine except the number in the AI (37), I get 3715 (the 4 is missing), if I change the 4 to a two char integer value such as 04 or 14 I am able to scan it in the barcode.

^BCN,390,N,N,N
^FD>;>8(02)19410525013094(37)4>8(15)200330>610BAT100^FS

The only issue is the system I am working with stores the value for AI 37 as integers, so if the QTY is 4 then it will print as a 4, but i am getting nothing at the moment.

Any assistance would be appreciated.

Thank you, Omeil

Terry Burton
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Omeil
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  • As per @Mark comment I did the following to fix, I changed to subset B for the qty so single digits appear. this is the completed line of ZPL ^FD>;>80219410525013094>6374>8>515200330>610BAT10020^FS – Omeil Mar 10 '20 at 19:32

2 Answers2

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You are manually selecting the numeric mode of code128, using >; at the start of the data field. Numeric mode encodes pairs of digits into single codewords. And unfortunately the printer silently drops any unpaired digits.

You must either zero-pad your data when in subset-C or switch to ZPL's automatic mode for code128, which does a good job at minimizing symbol length. For your data, keep the >; start mode and then let the automatic-mode shift or latch to subset-B as needed.

Mark Warren
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The answer seems to be replacing >8 with >6 for AI 37 to print quantities of single or odd digits! eg 4, 103, etc

CHIN HEE MICHAEL LIM
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